Several software questions... Help needed!

I'm choosing 'PowerJog' and '1 Button Launcher Pro'. Which one is better? I did some research and '1 Button Launcher Pro' seems to be designed with Tungsten in mind...

Is the Photo Album from handspring any useful?

I can't always hear the weak ringtones. Is there any program I can use to increase the volume?

I am also looking forward to install the diddlebug but I heard that the one in palmgear is out-of-date. Where can I find the most recent version?

I was a visor user and love the thinkdB2.5. However now it changed to Smartlist-to-go (in fact it is thinkdB 2.6) but now the system requirement for the device is OS4.0. Can my treo handle it or I need to keep using thinkdB2.5?